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March 29, 2025

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Mechanical Properties of Solids - Important Formulas, Definitions, and Examples | 11th Physics

Chapter 6: Mechanical Properties of Solids Chapter 6: Mechanical Properties of Solids Formulas: Stress, Strain, Hooke’s Law, Young’s Modulus, Bulk Modulus, Shear Modulus Introduction This chapter explores the mechanical behavior of solid materials when subjected to different types of forces. The study of the mechanical properties of solids includes concepts like stress, strain, and elastic behavior, governed by Hooke's Law. These properties are essential for understanding how materials deform under force and how they return to their original shape when the force is removed. 1. Stress and Strain Definition: Stress is the internal restoring force per unit area that develops within a material when an external force is applied. It is measured in Pascals (Pa). Formula: Stress (σ) = Force (F) / Area (A) Strain is the relative change in the shape or size of a material as a response to stress. It is a dime...

CJ Dropshipping vs. AliExpress: Which One is Better for Your Business?

cj dropshipping vs AliExpress If you’re stepping into the world of dropshipping, one of the biggest decisions you’ll face is choosing the right platform to source and fulfill products. CJ Dropshipping and AliExpress are two of the most popular options, but which one is better for your business? In this article, we’ll compare them in terms of pricing, shipping speed, product variety, automation, and more to help you make an informed decision. 1. Overview of CJ Dropshipping and AliExpress What is CJ Dropshipping ? CJ Dropshipping is an all-in-one dropshipping and fulfillment platform designed to help sellers find, source, and ship products globally. Unlike AliExpress, which primarily acts as a marketplace, CJ Dropshipping works directly with manufacturers and offers additional services like product sourcing, private labeling, and print-on-demand. What is AliExpress? AliExpress is one of the largest online marketplaces, where thousands of suppliers sell products at wholesale price...

units and measurements class 11 questions answers

Chapter 1: units and measurements class 11 questions answers Chapter 1: units and measurements class 11 questions answers 1. Multiple Choice Questions i) [L 1 M 1 T -2 ] is the dimensional formula for: (A) Velocity (B) Acceleration (C) Force (D) Work ii) The error in the measurement of the sides of a rectangle is 1%. The error in the measurement of its area is: (A) 1% (B) ( )% (C) 2% (D) None of the above iii) Light year is a unit of: (A) Time (B) Mass (C) Distance (D) Luminosity iv) Dimensions of kinetic energy are the same as that of: (A) Force (B) Acceleration (C) Work (D) Pressure v) Which of the following is not a fundamental unit? (A) cm ...

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